Wickless-burner oil stove



Mar. 6, 1923. 1,447,663 R. HOFFMAN WICKLESS BURNER OIL STOVE Filed Oct. 21, 1921 2 sheets-sheet 1 Mar. 6, 1923. 1,447,663

R. HOFFMAN WICKLESS BURNER OIL STOVE Filed Oct. 21, 1921 sheets sl'leet 2 train 's-rares PATENT oF-ric.

RUDOLPH HOFFMAN," OF KANK'AKEE; ILLINOIS,

ASSIGNOR TO SEARS, ROEBUCK AND 00., OFGHICAGO, ILLINOIS; A CORPORATION OF NEW YORK.

WIGKLESS-BU'RNER OIL STOVE;

Application fi'led October: 21, 1921'. Serial No.- 509,376.

To all whom it may concern:

Be it known that I', Rnnomur HOFFMAN, a citizen of the United States, residing at Kankakee, in the county of Kankakee and State of Illinois, have invented certain new and useful Improvements -in Vickless- Burner Oil Stoves, of which the following is a specification.

The invention relates to-oilv stoves of thetype in which a constant level of the oil is maintained; and the burners are mounted for up and down movement with respect to such oil'level.

Generally stated, the aim of the present invention is to provide improved mechanism for effecting such up and down movements of the. burners.

More specifically stated,.one object of the invention is to provide means of advantageous constructionlwhich is conveniently arranged so as to facilitate the operation of raising and lowering the burners.-

A further object is to provide sucha means embodying a member having the dual function ofenclosing: the'greater portion of the mechanism and of coactingl with the operating members or.l1andlesto sus-tainthe burners in their elevated positions against the action of gravity.

Still another object of the inventionis toprovide improved means for gilllCllIlg the burners in their up and which means is especially tion with the operating handles which are in'the formoflevers. I 7

Another object of the invention is to, provide a telescopic pipe connection between the burners and a stationary feed pipe, constructed to provide improved sealing and guiding means for themovable section of the connection. 7

The objects of the invention-thus generally stated, together with other and ancillary advantages, are attained by the construction and arrangement illustrated in the accompanying drawings forming part hereof, but it will be understood that various changes down movements,

may be made, by those skilled-in the art, in-

the form, construction: and arrangement of the parts, without. departing; from theispirit,

and scope of the invention as=expressed in the appended claims.

Fig. 1 1s a fragmentary front view of a adapted for coac- 7 its upper end with the burner two'burner stove equipped with my invention. F ig. 2 is a central vertical sectional view through a portion: of the stove, taken substantially in the plane of line 2-2 of Fig. 1. Fig; 3 is a fragmentary horizontal sectional View taken in the plane of" line 3-3 of Fig. 2. Fig. 4c is a fragmentary vertical sectional view showing the combined guiding and sealing means for the eX- tensible pipe connection;

Referring first to Figure 1 of the drawings, 7' designates the lower portion of a stove frame having a top 8 in which are supported the usual grids 9. 10 indicates a feed pipe leading from an oil well (not shown) mounted within a bracket 11 carried by one end ofthe frame, An oil reservoir 12 is arranged to be supported upon the bracket 11 above the oil well, in a manner well known in the art, so as to provide a continuous supply of oilto the pipe 10. 13 designates generally the burners positioned below the grids 9 and embodying burner bowls 14 connected by means of extensible pipe connections 15 with the feed pipe. 16 designates generally the means for raising and lowering the burner bowls 14 with respect to the oil level which is maintained constant by the oil feeding and supplying comprises a lower or outer section 17 communicating atr'its lower end with the pipe 10, and an upper or inner section 18 slidable within-thesect'ion 17 and communicating at upper endfof the outer section 17 is counterboredasat 19-so' as to provide a shoulder 20 upon which a. washer 21 is adapted to rest.

This washer is made of substantial thick-- ness and of a size adapted. to snugly receivethe pipe section 18.

The packing 22 isinserted between the WtLShBPQl and a nut 23 screw-threaded into the upper end of the outer pipe sections 17. The edges of the apertures inx the washer and nut through which the 11'1I161,SOCt-1OI1 passes are beveled inwardly asat 24 and 25. These beveled bowl 1 1. The

surfaces, it will be apparent tend to cause the packing to adhere to the inner pipe section when it is compressed between the two members. The latter, it will be observed, provide means for guiding, at spaced points the inner section of the pipe in its upand down movements.

Rising from the feed pipe 10 is a bracket 26 which, in the present instance, is vertically disposed and has a flange 27 at its upper end apertured to receive the upper pipe section 17 of the telescoping pipe connection. This bracket 26 is secured at its lower .end to the pipe by being formed integral with one of a pair of links 28 connecting a pair of blocks 29 and 29 disposed above and below the feed pipe 10. For this purpose the blocks are provided upon such opposite sides with outwardly projecting studs 30 which engage in apertures in the lower end of the bracket and the link, the parts being clamped together by means of a set screw 31 entered through the block 29 and bearing against the under side of the feed pipe 10. The lower end of the outer pipe section 17 is made fast with the block 29. It will thus'be observed that by this means, the extensible pipe connection, the raising and lowering means, and hence the burner as a. whole is detachably secured to the feed pipe.

Slidable vertically upon the outer pipe section 17, which thus constitutes an up right stationary guide stem, is a U-shaped bracket 32, the free ends of this bracket being apertured for this purpose. To the vertical portion of the bracket is secured the lower end of a plate 33 which depends from the burner bowl 1% along the rear side of the stem 17 The upper end of this plate is in serted into the burner bowl and diametrically thereof, and is provided at its extreme end with lugs 34 which are secured to inwardly extending projections 35 of the bowl in any suitable way. Thus: they may be extended through apertures provided in the projections 35 and secured thereto as by electric welding. The lower end of this plate is secured to the bracket as by means of a bolt 36 entered through a flange 37, formed at the lower end of the plate, and the upright portion of the bracket 32.

The operating means is in thefform of a hand lever 38 preferably constructed of sheet metal shaped to provide an outer hollow or rounded portion 39 and a pair of inner operatingarms -40 which straddle the stem 17 and are fulcrumed upon a pivot pin 41 carried thereby and entered in a transverse socket 26 which is formed upon the inner side of the bracket 26, the pin being held in said socket by engagement with the adjacent side of the stem 17. The arms 40 extend through the bracket 26 on the forward side of the stem 17 andtheir free ends have a sliding pivotal connection with the upright portion of the sliding bracket 32, upon the opposite side of the stem at a. point directly below the burner, suitable apertures 32 being provided in the bracket 32 for receiving the arms 40.

The handle 38 extends forwardly from the burner as shown in Fig.. 1 and preferably the forward portion 39 is arranged at an angle with respect to the arms 40 so that when the latter are inclined upwardly at a sharp angle, as is" the case when the burner is in its full lighted position, the handle is positioned away from the burner in order not to become overheated.

It will be observed that the handle thus formed, together with its operative connections, provides an extremely convenient means for raising and lowering the burner with comparative ease, and that the means provided for guiding the burner in its up and down movements ensure a smoothly operating raising and lowering mechanism.

Upon the forward side of the stove I provide a front wall which is preferably in the form of an arcuate plate or panel 42 embodying means for guiding the hand lever so as to prevent the burner from turning on the stem 7 and constituting means for enclosing the greater portion of the operating mechanism. Thiswall or panel is secured at its lower edge to the lower portion of the brackets 26 for the respective burners, as by means of screws 43, and at its upper edge engages with the upper end of the bracket 26 as shown in Fig. .2. At its opposite ends this plate member may be securedto the end members of the frame 7 in any suitable way.

The means for guiding the hand lever in its up and down movements comprises a slotted guide plate 44: which is secured over an enlarged aperture 45 provided in the plate &2, as by means ofbolts 46. These bolts 16' are entered through enlarged apertures 47 (Fig. 3) in the plate 12 so that the guide plate 1 1 is capable of adjustment with respect to tne plate 42'. This construction is provided in order to compensate for variations which may occur in the assembling of the stove in the positioning of the burners and operating mechanism with respect to the plate 12. In one edge of the aperture through the'guide plate there is formed a plurality of corrugations'pro'viding notches 48 with which a projection 49 upon the adjacentv side of the handle is adapted to yieldingly engage. By this construction, the burner is yieldingly or fric tionally held against downwardmovement under the action of gravity.

lVhile I have herein shown and described a special means for retarding the movements ofthe burner through the operation of the lever39, it will be understood that such means is not considered essential to extensible pi crimes:

the effective operation of my; device; Thus; If desired thesealing and guiding means which I have provided: for theextensible pipe: connection (Fig. 4) may be depended upon toeffect thedesired retarding action.

I have found that in some instances. it is desirable, in the case of a constant level oil stove or the'like, oil reservoir instead the purpose of oil level in the burner bowl. It will be obvious that the raising and lowering means hereinrdisclosedis not limited to use in raising and lowering the burner.

It will be'observed. that I have produced an improved means for raising and lowering, the" burners, and that the means provided for guiding the same in such movements renders the operation exceedingly smooth, easy, and substantially noiseless. The construction, moreover, isexceedingly simple so that it can be manufactured at a relatively low cost, while the stove as a whole presents a neat appearance, thegreater part of the operating mechanism being wholly concealed from View;

This application is a continuation in partof my prior applications,.Serial Nos. 260.966 filed November 4 1918', and 311,953 filed July 19, 1919.

I claim as my invention:

1. In an oil stove, the combination of a burner, and-means for supporting the burner for up and down movements including an pe' connection, a lever mounted upon a fixed pivot operatively connected with the burner, and an .arcuate member With which said lever engagesso as to retard the lowering: movement of" the'burner.

2. In' an oil" stove, the combination of a vertically movable burner, and" means for raising and lowering the burner including a lever operatively connected with the burner, andmeans defining a guideway for the lever arranged so as toengage-said lever and retard the lowering. movement of the burner.

3.. In an oil stove, the combination with a burner, of raising and lowering means therefor comprisingapivoted lever operatively connected with the bowl and projecting forwardly in the-stove and a stationary arcuatemember adapted for frictional en gagement" by said lever;v

of the oil burner for at. In an-oilstove, the combination with a burner, of raising and-lowering means therefor comprising a pivoted lever operatively connected: with thebowl and projecting forwardly in: the stove, a stationary arcuate member having an aperture therein for re ceiving saidlever, and? an adjustable plate on said member adapted said' lever.

In anoilstove, the-combination with a burnenof raising andlowering means therefor comprising: a. pivoted lever operatively for engagement by to" raise and lower the varying the height of the connected with the 1 bowl and projecting forwardly'in'thestove, and a stationary arcuato panel: having an adjustable plate with a plurality of notches therein, said lever having a: portion adapted to-engagein said notches whereby yieldinglyto maintain the lever against movement with respect to said member.

6; In an oil stove, the combination with one or more burners, of raising and lowering means for the burners comprising a pivoted lever operatively connected with the burner and projectingforwardlytherefrom, a panel closing the frontof the stove forwardly of the raising. and lowering means, said panel being" apertured to receive said handle, and and an apertured guide plate adjustably cured to the panel over the aperture therein.

T.v In an oil stove the combination with a burner, of raising and lowering means therefor including a stationary upright bracket, a lever fulcrumed upon said bracket, a second bracket guided for up and down movement and fixed with reference to the burner, said lever having: an operative connection with said second bracket, and a stationary wall for enclosing the raising and lowering means, said wall being apertured to permit saidlever to extend forwardly therethrough.

8. In an oilstove the combination with a burner comprising a burner bowl, means for raising and lowering: the burner including an upright stem, a bracket slidably mounted upon said stem andlfixed with reference to said bowl, and a lever mounted upon a fixed pivot and operatively connected with said bracket.

9. In an oil-stove the combination with a burner comprising a burner bowl, means for raising and lowering the burner including an upright stem, a bracket slidably mounted upon said stem and fixed with reference to said bowl, a lever mounted upon a fixed pivot and operatively connected with said bracket, and combined means for enclosing a portion of the raising and lowering mechanism and gniding'said-lever in its up and down movements'. i a

10; In an oil stove the combination of a burner bowl,v an upright stein, a bracket slidablymounted upon said stem and operatively connected with saidbowl, a pivoted hand lever operatively connected with said bracket on one side of said'stem, and'means upon the-opposite side of said stem for guiding said lever in its up and down movements so as to prevent said bracket from turning upon its stem;

11'. In an oil stove, the combination of an oil: supply pipe, a burner, means for coaducting a: supply of oil to the burner but permitting of the vertical movement of the latter, and raising and lowering means for the burner comprising a: stationary bracket ments of the latter, said means including a -ineans including a vertical guide stem, a part rigid with the hurnerand slidably engaging said stem, a stationary bracket, and a lever pivoted on said bracket and operatively connected with said slidable member.

13. In an oil stove, the combination of a horizontal oil supply pipe, a burner, means for conducting a supply of oil from said pipe to the burner but permittingof the up and down movements of the latter, said fitting rigidly mounted on said supply pipe, a vertical guide stein. rising from said fitting, a member fixed with reference to the burner and slidably engaging said stem, and a lever having a pivotal support fixed with reference to said fitting and operatively connected with said slidable member.

14L. In an oil stove, the combination with a vertically movable burner and an oil supply pipe, of an extensible pipe connection between said burner and supply pipe including a pair of relatively slidable pipe sections, an upright bracket, a member fixed with reference to said burner, and guided by said extensible pipe for' vertical movement with the burner, and a lever fulerumed on said bracket and. operatively connected with said vertically movable member.

15. In an oil stove, the combination of an oil supply pipe, a burner having a burner bowl and: a part fixed with reference to said how]. and depending therefrom substantially centrally thereof, a bracket fixed with ref-- erence to said pipe, a vertical stationary guide member also fixed with reference to said pipe, a member rigid with said pendent part and slidably engaging said guide menr her, a lever fulcrumed on said bracket and operatively connected with said slide memher, and means for conductinga supply of oil from the supply pipe to the burner bowl but permitting of the up and down movements of the latter.

Y 16. In an oil stove, the combination with a burner and an oil supply pipe, of an extensible pipe connection between said burner and said pipe comprising a pair of telescoping pipe sections, a stationary bracket, a

part rigid with and depending from the burner means for uidin said Jart and "thereby the burner in its up and down movements, and alever fulcrumed on said bracket and operatively connected with said part depending from the burner.

17. In an oil stove, the combination with a stationary supply pipe and a burner connected therewith to receive oil therefrom, means for raising and lowering the burner comprising an upright stationary part, a lever fulcrumed on said part andconnected with the burner, and a member with which said lever is adapted to frictionally engage in its movementsj 18. In an oil stove, the combination with a stationary supply pipe and a burner connected therewith to receive oil therefrom, of means for raising and lowering the burner comprising an upright stationary part, a lever fulcrmned on said part and connected with the burner, and a stationary member with which said lever is adapted to frictionally engage in its movements, said stationary member having legendson one face to inclicate the position of the burner.

19. In an oil stove, the combination with an oil supply pipe and a burner, of a fitting mounted on said pipe, an extensible pipe connection between said fitting and said burner comprising two interfitting pipe sections one rising from the fitting and the other section depending from the burner, and means for raising and lowering the burner comprising a hand lever'pivotally mounted with reference to said fitting and operatively connected with said burner.

20. In an oil stove, a vertically disposed part guided for up and down movements, a plate rigid with said part and having a pair of apertures therein, anda hand lever pivotally mounted on a fixed axis to swing in a vertical plane and having arms arranged one upon each side of said part and engaging in said apertures. i

21. In an oil stove, the combination with an oil supply pipe and a burner, of an'extensible-pipe connection between said supply pipe and said burner comprising apair of telescoping'pipe sections, a stationary bracket, a lever plvotally mountedon said bracket, a part fixed with reference to said burner andhavingthe lever operatively con-' an oil supply pipe and a burner, of means for raising and lowering the burner with reference to saidsupply pipe, and means including an upright stem for conducting a supply of oil from the supply pipe to the burner, said raising and lowering'means comprising a bracket and a hand lever pivotally mounted on the bracket toswing in a vertical plane and bifurcated at one end so as to straddle said stem, the divided portions of the lever each being operatively connected with i the burner.

23. In an oil stove, the combination with an oil supply pipe, of a burner mounted for movement up and down with reference to said pipe and'having a depending stem, and means for raising and lowering the burner comprising a bracket and a lever operatively connected with the burner and fulcrumed on said bracket, said lever having a pair of arms one upon each side of said stem and each slidable longitudinally relative to one of its associated parts.

24. In an oil stove, the combination with a burner, of means including a depending tubular stem, for conducting a supply of oil to the burner "but permitting a raising and lowering thereof, and means for effecting such raising and lowering movements comprising a lever having a pair of laterally spaced arms at one end adapted to straddle said stem, astationary bracket upon which said lever arms are fulcrumed to swing on a horiaontal axis, and means operatively connecting the lever arms with the burner.

In an oil stove the combination of a feed pipe, a burner bowl, an extensible pipe connection between said feed pipe and said bowl including a pair of telescoping pipe sections, the outer one of said sections constituting a stationary upright stem, a bracket slidably mounted upon said stem and connected with said bowl, and a pivoted lever operatively connected with said bracket for raising and lowering the bowl.

26. In an oil stove the combination of a feed pipe, a burner bowl, an extensible pipe connection between said pipe and said bowl including a pair of telescoping pipe sections, the outer one of which constitutes a station ary upright stem, means carried by said bowl and slidably engaging said stem 50 as to be guided by the latter in its up and down movements, and means acting between said pipe sections for guiding the inner section in its up and down movements.

27. In an oil stove the combination of a burner bowl, a source of oil supply, an extensible pipe connection between said source of supply and said bowl comprising a stationary outer pipe section and a movable inner pipe section, means carried by the burner bowl and slidably engaging said outer pipe section so as to be guided thereby, and means for guiding the inner pipe section at spaced points in its up and down movements, comprising a collar within the outer pipe section and a packing nut screw-threaded into the upper end of said outer pipe section.

28. In on oil stove, the combination of a burner bowl, a source of oil supply, means for connecting said bowl with said source of supply including an upright tubular stem communicating with the bowl, raising anc lowering means for the bowl. including an Eh al operating lever mounted upon a stationary pivot and operatively connected with the bowl, and means for engaging with said stem at spaced points inits length for guiding the same inits'up and down movements.

29. In an oil stove, the combination of a burner, a feed pipe, an extensible pipecon nection between said burner and said feed pipe including a pair of telescoping pipe sections, means for detachably connecting the outer pipe section upon the feed pipe comprising a member fixed with reference to the lower end of said pipe section, a sec ond member arranged upon the lower side of the feed pipe, a pair of links connecting said members, and a clamping screw engaging the lowermost member and said feed pipe.

30. In an oil stove the combination of a burner, a feed pipe, an extensible pipe connection between said burner and said teed pipe including a pair of telescoping pipe sections, means for detachably connecting the outerpipe section upon the feed pipe comprising a member fixed with reference to the lower end of said pipe section, a sec ond member arranged upon the lower side of the feed-pipe, a pair of links connecting said members, a clamping screw engaging the lowermost member and said feed pipe, and means for raising and lowering the burner including a hand lever, one of said links being extended to provide a bracketupon which said lever is pivoted, and means operatively connecting said lever with the burner. 100

31. In an oil stove the combination of a burner, a feed pipe, an extensible pipe connection between the burner and the feed pipe including an outer pipe section, means for securing said outer pipe section upon the feed pipe, a bracket carried by said securing means, and a lever fulcrumed upon said bracket and operatively connected with the burner for raising and lowering the same.

32. In an oil stove the combination with a burner, f raising and lowering means therefor including a hand lever formed of sheet metal and having an inner operating portion comprising a pair of spaced arms operatively connected with the burner, and a rounded hand portion projecting forwardly from said arms.

33. In an oil stove, the combination of a burner bowl. a stationary upright stem, a bracket slidably mounted upon said stem, a lever pivoted between its ends and havin one end operat-ively connected with said bracket, and means connecting said bracket with the burner bowl.

34. In an oil stove the combination of a burner bowl, a stationary upright stem, a bracket slidably mounted upon said stem, a lever pivoted between its ends and having one end operatively connected with said bracket, and means connecting said bracket 130 being annular in form, said plate being rigid at its upper end with the bowl and extending downwardly therefrom for connection with the bracket.

' ing mechanism therefor comprising 35. In an oil stove the combination of an annularburner bowl, and raising and lowera plate arranged diametrically of said bowl and secured at its upper end to the bowl, said plate having a depending portion, and a bracket carried by said depending portion and adapted for connection with the actuat ing means of the raising and lowering mechanism.

36. In an oil stove the combination of an annular burner bowl, and raising and lower ing means including a member mounted for up and down movement, a stem for guiding said member, and a plate depending from the burner bowl at one side of said stem and secured at its, lower end to said member.

87. In an oil stove the combination of an annular burner bowl, and raising and lowering means including a plate arranged substantially diametrically of the burner and depending therefrom, said plate having rigid therewith a part substantially perpendicular menses thereto and an operating lever having a sliding pivotal connection with said part and fulcrumed at a point forwardly of the burner.

38. In an oil stove, the combination of a vertically movable burner, and means for raising and lowering the burner including a lever, a plate secured to and depending from the burner, and a part rigid with the plate, said part having a slot therein to receive the rear end of said lever.

89. In an oil stove, the combination of a burner having a burner bowl, a member secured to the burner and depending therefrom, said member having rigid therewith a part with a pair of laterally spaced slots therein, and a lever mounted on a fixed pivot and having a bifurcated end providing spaced arms adapted to enter said slots.

40. In an oil stove, the combination of a burner, a part rigid with the burner and having an aperture therein, and a lever mounted upon a fixed pivot between its ends, one end of said lever being entered through said aperture. i

In testimony whereof, I have hereunto set my hand.

RUDOLPH HOFFI AN. 

